PROCESS FOR PRODUCING PYRIDINECARBOXAMIDES OR THIOCARBOXAMIDES
申请人:KUREHA KAGAKU KOGYO KABUSHIKI KAISHA
公开号:EP0881217A1
公开(公告)日:1998-12-02
A process for producing N-substituted pyridine carboxamide or thiocarboxamide, comprising reacting a substituted or unsubstituted pyridine metal compound with substituted isocyanate or isothiocyanate to obtain an addition reaction product thereof, and then substituting the metal of said addition reaction product with a proton. The process according to the present invention can be applied even to compounds having an oxidation-susceptible substituent group and, therefore, industrially useful.
Benzoisothiazolone Organo/Copper-Cocatalyzed Redox Dehydrative Construction of Amides and Peptides from Carboxylic Acids using (EtO)<sub>3</sub>P as the Reductant and O<sub>2</sub> in Air as the Terminal Oxidant
作者:Lanny S. Liebeskind、Pavankumar Gangireddy、Matthew G. Lindale
DOI:10.1021/jacs.6b03168
日期:2016.6.1
Carboxylic acids and amine/amino acid reactants can be converted to amides and peptides at neutral pH within 5-36 h at 50 °C using catalytic quantities of a redox-active benzoisothiazolone and a copper complex. These catalytic "oxidation-reduction condensation" reactions are carried out open to dry air using O2 as the terminal oxidant and a slight excess of triethyl phosphite as the reductant. Triethyl